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1.  4-Meth­oxy-N-[(E)-(5-nitro­thio­phen-2-yl)methyl­idene]aniline 
The title mol­ecule, C12H10N2O3S, is nonplanar with an inter­planar angle of 33.44 (7)° between the benzene and thio­phene rings. In the crystal there exist only weak inter­molecular C—H⋯O inter­actions, π–π inter­actions between the benzene rings [centroid–centroid distance = 3.7465 (14) Å] and X—Y⋯π inter­actions to the thio­phene and benzene rings [N⋯centroid distances = 3.718 (3) and 3.355 (3) Å, respectively]. Inter­molecular C—H⋯O inter­actions link the mol­ecules into chains parallel to the a axis.
doi:10.1107/S1600536812034344
PMCID: PMC3470380  PMID: 23125793
2.  (E)-1-[(3-Iodo­phen­yl)imino­meth­yl]naphthalen-2-ol 
In the title mol­ecule, C17H12INO, the dihedral angle between the naphthaldeyde plane and the 3-iodo­aniline plane is20.07 (13)°. It exists in the solid state as an enol–imine tautomer with a strong intra­molecular O—H⋯N hydrogen bond.
doi:10.1107/S1600536812036793
PMCID: PMC3470381  PMID: 23125794
3.  (E)-1-[(3-Bromo­phen­yl)imino­meth­yl]naphthalen-2-ol 
The title compound, C17H12BrNO, exists in an enol–imine form and the mol­ecular structure features an intra­molecular O—H⋯N hydrogen bond. The dihedral angle between the benzene ring and the naphthalene ring system is 17.27 (15)°.
doi:10.1107/S1600536812034824
PMCID: PMC3435811  PMID: 22969657
4.  2-Methyl-3-nitro-N-{(E)-[5-(4-nitro­phen­yl)furan-2-yl]methyl­idene}aniline 
In the title Schiff-base type compound, C18H13N3O5, the central furan ring makes dihedral angles of 12.80 (7) and 51.43 (4)° with the terminal benzene rings. The dihedral angle between the benzene rings is 45.43 (3)°. In the crystal, C—H⋯O hydrogen bonds link the mol­ecules into layers parallel to (010). In addition, there are π–π stacking inter­actions within the layer [centroid–centroid distance = 3.584 (1) Å] and between the layers [centroid–centroid distance 3.751 (1) Å].
doi:10.1107/S1600536812033818
PMCID: PMC3435658  PMID: 22969531
5.  (Z)-2-[(E)-2-(1-Benzothio­phen-3-yl­methyl­idene)hydrazin-1-yl­idene]-1,2-diphenyl­ethanone 
The title compound, C23H16N2OS, is not planar, the phenyl ring of the benzoyl group making a dihedral of 77.61 (7)° with the benzothio­phene system ring. The benzothio­phene system and the remaining phenyl ring make an angle of 12.71 (13)°. The conformation around the imine functions is E for the C=N bond towards the benzothio­phene system and Z for the C=N bond towards the benzoyl group. The packing of the mol­ecules shows C—H⋯π inter­actions. A weak intramolecular C—H⋯N bond also occurs.
doi:10.1107/S1600536812030978
PMCID: PMC3415019  PMID: 22905006
6.  2-(2-Fluoro-4-hy­droxy­benz­yl)isoindoline-1,3-dione 
In the title compound, C15H10FNO3, the dihedral angle between the isoindoline-1,3-dione and 3-fluoro-4-methyl­phenol groups is 86.88 (8)°. The isoindoline-1,3-dione fragment is almost planar, with an r.m.s. deviation of 0.0154 Å within the group. Inter­molecular C—H⋯O hydrogen bonds generate C(6) chains running parallel to the [010] direction.
doi:10.1107/S1600536812029923
PMCID: PMC3414933  PMID: 22904920
7.  (E)-4-Methyl-N-[(5-nitro­thio­phen-2-yl)methyl­idene]aniline 
In the crystal structure of the title compound, C12H10N2O2S, the benzene and the 2-nitro­thio­phene rings make a dihedral angle of 7.47 (12)°. The dihedral angle between the nitro group and the attached ring is 1.9 (6)°.
doi:10.1107/S1600536812026062
PMCID: PMC3393928  PMID: 22798793
8.  5-Diethyl­amino-2-{(E)-[(3-iodo­phen­yl)imino]­meth­yl}phenol 
The title Schiff base, C17H19IN2O, is not planar, displaying a dihedral angle of 34.9 (2)° between the two aromatic rings. The mol­ecular conformation allows the formation of a strong intra­molecular O—H⋯N hydrogen bond with graph-set motif S(6) between the hy­droxy group and the imine N atom.
doi:10.1107/S1600536812022556
PMCID: PMC3379512  PMID: 22719710
9.  5-Diethyl­amino-2-[(E)-(2,4-dimeth­oxy­phen­yl)imino­meth­yl]phenol 
The title Schiff base, C19H24N2O3, exists in the crystal structure in the phenol–imine tautomeric form with an intra­molecular O—H⋯N hydrogen bond. The planes of the aromatic rings form a dihedral angle of 36.8 (8)°. The crystal packing is characterized by C—H⋯O hydrogen bonds and π–π stacking inter­actions [centroid–centroid distance = 3.478 (4)Å].
doi:10.1107/S160053681201882X
PMCID: PMC3379200  PMID: 22719398
10.  (E)-N-(1-Benzothio­phen-3-yl­methyl­idene)-2,6-dimethyl­aniline 
In the title compound, C17H15NS, the benzothio­phene residue and the substituted benzene ring are oriented at a dihedral angle of 61.99 (7)°. An inter­molecular C—H⋯π inter­action contributes to the stability of the crystal structure.
doi:10.1107/S1600536812004151
PMCID: PMC3295420  PMID: 22412531
11.  (E)-3-[(2-Methyl-4-nitro­phen­yl)imino­meth­yl]-1-benzothio­phene 
In the title conpound, C16H12N2O2S, the 1-benzothio­phene residue and the substituted benzene ring are oriented at a dihedral angle of 53.36 (6)°. The mol­ecular conformation features a short C—H⋯N contact. There are no significant inter­molecular contacts.
doi:10.1107/S1600536812000190
PMCID: PMC3275043  PMID: 22346988
12.  2-Ethyl-N-[(5-nitro­thio­phen-2-yl)methyl­idene]aniline 
In the title compound, C13H12N2O2S, the dihedral angle between the benzene and thio­phene rings is 36.72 (8)°. An inter­molecular C—H⋯π inter­action contributes to the stability of the crystal structure.
doi:10.1107/S1600536811024615
PMCID: PMC3213459  PMID: 22091038
13.  (E)-2-[3-(Trifluoro­meth­yl)phenyl­imino­meth­yl]benzene-1,4-diol 
In the title compound, C14H10F3NO2, the two benzene rings are oriented at a dihedral angle of 31.94 (14)°. An intra­molecular O—H⋯N hydrogen bond helps to stabilize the mol­ecular structure. In the crystal, inter­molecular O—H⋯O hydrogen bonding links the mol­ecules, forming chains running along the crystallographic a axis. The F atoms of the trifluoro­methyl group are disordered over two positions with refined site occupancies of 0.488 (5) and 0.512 (5).
doi:10.1107/S1600536809041610
PMCID: PMC2971128  PMID: 21578348

Results 1-13 (13)